Kong guksu is a popular vegetarian friendly, summer noodle dish served in a chilled soybean broth. In Korean, kong means bean, while guksu is another word for noodle. The noodle is usually made with wheat flour adding to the chewiness and soup made from ground soybeans which results in a thick, milky and creamy consistency. Some may add additional creamers and other ingredients to make the soy milk broth even thicker and creamier. Much like kalguksu ("knife" soup), kong guksu is made from the exact same wheat noodle but it is submerged in its cool broth, sometimes containing additional ice to keep it nice and chilled whereas kal guksu has a clear, usually seafood-based broth, served hot.

There are many variations of this dish but traditionally, it contains a refreshing hearty bowl filled with wheat noodles, soy milk, cucumbers, and ground peanuts or pine nuts. Other variation may contain parboiled potato, pear and other vegetables or even fruits such as watermelon.